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Re: [Webpush] Receipt subscription follow-up

Brian Raymor <Brian.Raymor@microsoft.com> Wed, 27 April 2016 17:22 UTC

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From: Brian Raymor <Brian.Raymor@microsoft.com>
To: Martin Thomson <martin.thomson@gmail.com>, Costin Manolache <costin@gmail.com>
Thread-Topic: [Webpush] Receipt subscription follow-up
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Date: Wed, 27 Apr 2016 17:22:04 +0000
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Cc: "webpush@ietf.org" <webpush@ietf.org>
Subject: Re: [Webpush] Receipt subscription follow-up
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On Tue, Apr 26, 2016 at 9:21 PM Martin Thomson <martin.thomson@gmail.com> wrote:
...
> However, in this case, can we request that the application server
> DELETE (just like the client uses DELETE to acknowledge)?

To clarify, you're proposing that the application server delete the same push message resource that was deleted by the user agent to acknowledge receipt of the message? If so, something like:

If the push service receives the acknowledgement and the application
has requested a delivery receipt, the push service MUST return a 204
(No Content) response to the application server monitoring the
receipt subscription.

To ensure that a receipt is properly delivered to the application
server at least once, the application server MUST acknowledge receipt
of the response by performing a HTTP DELETE on the corresponding 
push message resource.

If the push service does not receive the acknowledgement within a
reasonable amount of time, then the receipt is considered to be not
yet delivered. The push service SHOULD continue to retry delivery of
the receipt until the advertised expiration of the corresponding push
message.

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